Question

why aluminium cannot be reduced by c
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Answer 1

Explanation:

Oxides of elements from Potassium to Aluminium in the reactivity series cannot be reduced by the use of reducing agents as they have a strong affinity for oxygen, are highly electro positive and stable and can only be reduced electrolitically

Answer 2

Because aluminium has greater affinity for oxygen than for carbon, therefore carbon cannot reduce alumina (Al2o3) to aluminium